Good afternoon/morning/evening/etc.

I am not posting this in the hardware issue section, as I am not sure if other people are having this problem, but when I boot from USB to Backtrack 4 and get into the CLI, when attempting to use the StartX command to initialize the GUI for the desktop, I get a white screen followed by a series of epileptic horizontal bars that flash incessantly. Now, using the apt-get command, I issued a apt-get aticonfig (Well, it directed me towards another program, can't remember it off the top of my head) and downloaded the aticonfig for my graphics card. From there, I did a aticonfig command, and it displayed my video card, as well as the driver linux was using. Any thoughts?